At first, I didn't understand exactly what was happening, but once I did I realized how clever this conceptual twist is on the typical puzzle/platformer genre. I think opening up possibilities by moving blue into a wall while red moves, or jumping red into a pit, etc, allows for some really clever level design that I enjoyed. Also, if this is made in Pygame, very impressive, I haven't seen a Pygame game that looks this good in a very long time.
Some suggestions if you want to continue a little bit of polish on this:
- SFX/music rework/volume controls, I had to mute the game because it was very loud on my PC
- Tutorial Level, explaining what you have in your itch.io submission page
- Restart button after you die
- Consider getting rid of lives system and just restarting the level indefinitely - It can be a little annoying to restart from the beginning every time (also have to close and reopen the game)
- Level Select
I totally understand if this was because you didn't have enough time before the submission deadline though :), really nice jam entry!